IWC Portuguese Perpetual Calendar

A member of the IWC Portuguese family, Reference 5023 launched in 2009 confirms once again the Swiss company’s ability to turn science into an exquisite art and to combine high precision, innovation and cutting edge technology with distinguished elegance.

A high precision device to be used by modern explorers and a tribute to this country’s past featured by great navigators like Vasco da Gama, Bartolomeu Dias and Fernando Magellan the same time, the Portuguese Perpetual Calendar has all the features the brand’s loyal customers would expect: three perpetual calendar sub-dials (one for the months at 6 o’clock, a second one indicating the days of the week at 9 o’clock and a third one for the date at 3 o’clock), a rectangular four-digit year display and a very precise moon phase display at 12 o’clock.

From an aesthetical point of view, this model strikes by the perfect harmony between the charcoal grey (ardoise) color of the dial and the silvery tone of the while gold – the raw material used for all the other elements (the solid case, the delicate hours and minutes hands, the embossed figures and the moon and stars indicators). The brown alligator leather bracelet adds a touch of color and style.

Using mechanical movement equipped with a Pellaton winding system, the watch guarantees a seven days long power reserve when fully winded. Its precision level is so high that it give only a 12 seconds error per moon phase (29 days, 12 hours, 44 minutes and 3 seconds), which means that the owner will have to take into account a deviation of one day during more than half a century. The 3 bar water resistance feature, together with the sapphire glass convex antireflective coating used on its both sides make this timepiece one of the most reliable items issued by IWC Schaffhausen.